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Yield prediction and nitrogen recommendation in maize using normalized difference vegetation index
TB Karki
Agronomy Journal of Nepal , 2013, DOI: 10.3126/ajn.v3i0.9009
Abstract: A study was carried out using three maize genotypes with three levels of nitrogen (30 kg, 60 kg and 120 kg per hectare) during the summer season of 2010 and 2011with the aim of predicting maize (Zea mays L.) yield through the Normalized difference vegetation index (NDVI). The NDVI was recorded at different times throughout the growing season using a Greenseeker? handheld sensor. Significant effect of genotypes and nutrient levels on the NDVI was observed at different growth stages of maize. There was positive correlation between the NDVI and grain yield. In the first season, the correlation coefficients were 0.90, 0.92, 0.76 and 0.73, respectively at 15, 45, 75 and 110 days after seeding. In the second season, the correlation coefficients were 0.80, 0.92, 0.77 and 0.75 respectively at 15, 45, 75 and 110 days after seeding. The NDVI based N calculator showed that irrespective of genotypes, yield potentials under farmers' levels of nutrient management were almost half of the recommended doses of nitrogen. The amount of N to be top dressed decreased with increased crop duration. Grain yield varied significantly due to season, genotypes and nutrient levels. NDVI was affected due to season, stages of the crop (DAS), genotypes and nutrient levels. Interaction effects were significant for season x genotype, growth stage x genotype, growth stage x nutrient levels, genotype x nutrient levels and genotype x growth stage x nutrient levels. There was a strong positive correlation between NDVI and grain yields of hybrid maize at 15 and 45 DAS, but this correlation declined thereafter. This means that N top-dressed at or after 75 days of seed sowing will not increase grain yield as significantly as N applied earlier in the season. In contrast, topdressed N was producing significant effects on the open pollinated Rampur Composite even after 75 days of seed sowing. Further confirmation of the finding could be useful for top dressing N in the maize crop.
Participatory variety slection of cold tolerant rice in the western hills of Nepal
TB Karki, KB Koirala, SB BK
Agronomy Journal of Nepal , 2010, DOI: 10.3126/ajn.v1i0.7545
Abstract: To verify and up scale promising cold tolerant rice genotypes in the western hills, participatory variety selection (PVS) activities viz; coordinated farmer’s field trials (CFFTs), FFTs prepared from Lumle , farmers’ acceptance tests (FATs), larger plot demonstrations, and upscaling activities were conducted during 2008 to 2009. Yield and yield related parameters considering farmers’ preferences were also recorded and analyzed for PVSs under FATs. In 2008, genotypes NR10481-B-11-1-1-1, NR10479-B-33-2-1-1 and NR10482-B-10-3-2-2 had been preferred by farmers because of high grain yield and desired parameters. In 2008, grain yield of Machapuchhre-3, Chhomrong Dhan, and Lumle 5- 2 over yielded Farmers’ Local (2.2 mt/ha) by 83, 89 and 81%, respectively whereas in 2009, grain yield increment of Machapuchhre- 3, Chhomrong Dhan, Lumle- 2, and Chandannath-3 over Farmers’ Local (2.1 t/ha ) was 98 %, 97%, 1078% and 49 %, respectively. Farmers of upper high hills (>2000-m) and high hills (1500-2000-m) preferred Chandannath-3, Machapuchhre- 3, and Chhomrong Dhan while Lumle-2 was liked by farmers of mid hills (1000-1500-m ). DOI: http://dx.doi.org/10.3126/ajn.v1i0.7545 Agronomy Journal of Nepal (Agron JN) Vol. 1: 2010 pp.74-79
Patient safety:Minimising medical error
TB Welzel
Continuing Medical Education , 2012,
Abstract:
Exploring the acute myeloid leukaemias
TB Thapa
Journal of Pathology of Nepal , 2013, DOI: 10.3126/jpn.v3i6.9001
Abstract: The acute myeloid leukemias are genetically a diverse group of neoplasm with varied clinical behavior and response to treatment. Advances in immunophenotyping, cytogenetics and molecular genetics have resulted in better understanding of their genesis. Risk stratification of different variants is now emerging. Therapy strategies are now increasingly being developed considering the inherent biological behavior of the different subtypes. It is anticipated that in the future, deeper secrets of these once fatal diseases will be unraveled by advances in newer genomic techniques. It is hoped that future use of gene specific tailored therapy and strategies will result in longer survival in cases showing poorer prognosis at present. DOI: http://dx.doi.org/10.3126/jpn.v3i6.9001 Journal of Pathology of Nepal (2013) Vol. 3 , 497-501
Laboratory Outbreak investigation of Sudden Death Syndrome in Broiler Chicken in Kathmandu Valley Nepal 2009
Kedar Karki
Research Journal of Poultry Sciences , 2012, DOI: 10.3923/rjpscience.2012.1.3
Abstract: The incidence of death of broiler birds above 40 days suddenly increased in the month of July-October 2009 in Kathmandu valley. Birds that were presented for post-mortem examination at the Central Veterinary Laboratory, Tripureswor, Kathmandu were usually found dead on their backs with wings out-stretched. Gross abnormalities recorded on post mortem examinations were: muscle oedema, pulmonary, renal and liver congestion, dark black to pale yellow streaked liver bile filled gall bladder and congestive splenomegaly, blood clot in atrium haemorrhage in duodenal muscle, whitish yellow pasty fluid in proventriculus gland, greenish coloration marked intact feed particles in gizzard and excessive mucous filled swollen intestine. Incidence rate was recorded between 1.5-2.5% of the flock. The mean mortality rate due to sudden death syndrome was 1.3-9.6%. Penicillium sp. and Aspergillus sp. with CFU ranging from 56x10-4 to 62x105, to uncountable mold count, E. coli, Streptococcus sp. and Staphylococcus sp. were the usual organisms isolated from culture samples of liver, lung, spleen and proventriculus.
Clinical Epidemiological Investigation of Moldy Grain and Fodder Poisoning in Goat in Kathmandu Valley
Kedar Karki
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2012.789.790
Abstract: An outbreak of a syndrome of unknown etiology associated with the feeding of moldy maize grain and green fodder to goat in a herd of male 3853 goats for sale for the Dashahara festival during the month of October 2010 in Kathmandu valley. In a period of 10 days 500 goats suddenly became ill with symptoms of anorexia, apathy, diarrhea and ruminal stasis. On clinical examination these goats were provisionally diagnosed with sudden illness and moldy corn/fodder poisoning was suspected. They were treated with biolive, tetrachlor, polyte, C-lyte, stress care and antidegnala liquor but 250 goats died. Necrosis of the fore stomach mucosa was the most characteristic gross pathological change. Clinical pathological findings included mild focal erosions to severe, diffuse, coagulative necrosis of the mucosa in the rumen, reticulum, omasum, congestion and hemorrhages in the abomasum. Liver with shrunken appearance and pale to yellowish discoloration with bile filled distended bladder, pin point hemorrhage in kidney, intestine with excessive mucus. On mycological and microbiological examination of tissue samples from post-mortem of dead goat on respective medium revealed the growth of fungal pathogens like Penicillium sp. with Staphylococcus. These results provide circumstantial evidence that feeding on moldy maize grain and green fodder leaves infested with Penicillium may cause outbreaks of systemic mycosis in goats.
A Laboratory Epidemiological Outbreak Investigation of Kumri(Cerebrospinal nematodiasis)and use of diethylecarbamazin in treatment of Goat in Banke district of Mid-Western Region of Nepal
Kedar Karki
Veterinary World , 2008,
Abstract: Seasonal occurrence (mainly in October-November) of a disease syndrome locally called ‘Kumri’ meaning weak back was observed in goats in Banke and other districts of western Terai in the last few years. Traumatic injury to the lumbar region, nutritional deficiencies and parasitism in the spinal cord were the likely causes considered. Based on the epidemiological pattern viz; seasonal occurrence, clinical symptoms, afebrile condition and local nature of infection, and non response to supplementation of vitamins and minerals, the disease was provisionally diagnosed as cerebrospinal nematodiasis. This has been further substantiated through laboraotry of Seteria spp in cattle in this region, detection of microfilaria in affected goat and treatment response of affected goats with diethylcarbamazine. As adult seteria spp in cattle, Buffalo and microfileria from blood smears of affected goat confirmed the cerebrospinal nematodisease in goat in Nepal. [Veterinary World 2008; 1(6.000): 168-170]
Safeguarding our Future: Minimizing Litigations in Maternity Care
Chandra Karki
Nepal Journal of Obstetrics and Gynaecology , 2012, DOI: 10.3126/njog.v7i1.8824
Abstract: Nepal Journal of Obstetrics and Gynaecology / Vol 7 / No. 1 / Issue 13 / Jan- June, 2012 / 1-4 DOI: http://dx.doi.org/10.3126/njog.v7i1.8824
Suicide : Leading Cause of Death among Women in Nepal
C Karki
Kathmandu University Medical Journal , 2011, DOI: 10.3126/kumj.v9i3.6294
Abstract: No abstract available. DOI: http://dx.doi.org/10.3126/kumj.v9i3.6294 Kathmandu Univ Med J 2011;9(3):157-8 ?
Prevalence of coronary artery disease and nation's responsibility towards patients
DB Karki
Journal of Kathmandu Medical College , 2012, DOI: 10.3126/jkmc.v1i1.7247
Abstract: DOI: http://dx.doi.org/10.3126/jkmc.v1i1.7247 Journal of Kathmandu Medical College, Vol. 1, No. 1, Issue 1, Jul.-Sep., 2012 pp.1-2
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